RE: HYDROGEN costs 6X more than EV15 Jan 2022 21:37
I understand why cost, in this case running cost, would drive the decision to cancel the order, but I still wonder how the charging infrastructure works out for making all the buses battery electric. My understanding is that a bus typically has a battery capacity of 300kWh-400kWh which is probably good for a standard day's shift (assuming approximately 10 hours). To recharge at the end of the shift therefore, each bus requires about 30-40kW charger running for the rest of the day which is about 1 standard domestic home running at full capacity for 10-14 hours. I don't see that being a problem for a small network of buses, but is there a fleet size where it does start producing a strain on the grid network?
I also wonder the effect on long-term reliability, of running this sort of fleet, on recharging equipment. After all, if the charger fails for whatever reason then you've got an unplanned bus out of service. Naturally reliability for all early systems tends to improve over time as design flaws get ironed out, so it's possible the scenario I paint would be teething problems at worst.
I suppose in the grand scheme of green hydrogen demand, buses were only a small non-essential element, but it would have been nice to see it grow rather than shrink away in order to show that there really is a hydrogen economy. I still think the big demand should come from power storage of renewables, in particular wind turbines, but the 'simple' answer of batteries may yet take the first chunk of that market too.